The Stem,fluid Valve, cataloged under National Stock Number 4820-01-418-2137, is classified within Federal Supply Class 4820 (Valves, Nonpowered) of the Valves group. The manufacturer of record is Naval Sea Systems Command. Government technical data includes 6 specifications, cited from the U.S. Government catalog. The record lists 2 manufacturer part numbers for this item, enabling identification through both NSN and commercial part number lookups. 4 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. 4 items share a part number with this NSN in the catalog (possible match — not a government interchangeability claim). Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 4820-01-418-2137 |
| Primary Part Number | 218002324 |
| Item Name | Stem,fluid Valve |
| FSC / FSG | 4820 / 48 — Valves, Nonpowered |
| Manufacturer | Naval Sea Systems Command |
| Status | ACTIVE |
| Valve Type for Which Designed | BALL |
| Largest Outside Diameter | 1.301 INCHES MAXIMUM IN |
| Stem Actuating End Type | SQUARE |
| Material Document and Classification | ASTM B150, ALY UNS 63200 ASSN STD SINGLE MATERIAL RESPONSE |
| Valve Size for Which Designed | 8.000 INCHES IN |
| Material | COPPER ALLOY |
| Acquisition Status | ACTIVE |
| DEMIL Code | DEMIL A — No Demilitarization Required |
| Hazard | No hazard code in the DLA record (HMIC N) |
| Criticality Code | X |
| Part Number | Manufacturer |
|---|---|
| 556-6406598 FN MACD-A14 | Naval Sea Systems Command (USA) |
| 218002324 PRIMARY | Naval Sea Systems Command (USA) |
| Reference | Meaning |
|---|---|
| 6406598 | D/9 Drawing number reference only Naval Sea Systems Command |
| DD2300-4359 FN MACD A-14 | 5/9 Secondary reference Huntington Ingalls Inc Div Newport News Shipbuilding |
| C7901-5901 | D/9 Drawing number reference only U.S. Government activity |
| C7901-5901 FN MACD-A14 | 5/2 Secondary reference U.S. Government activity |
NSN 4820-01-418-2137 is a Stem,fluid Valve, manufactured by Naval Sea Systems Command, classified under FSC 4820, Valves, Nonpowered. Status: active.
NSN 4820-01-418-2137 has 2 manufacturer part numbers on file: 556-6406598 FN MACD-A14 (Naval Sea Systems Command), 218002324 (Naval Sea Systems Command).
4 possible matches (shared part number, not a government interchangeability claim): 4820-01-418-2138, 4820-01-418-2141, 4820-01-418-3544. Verify interchangeability with system specifications before substitution.
Key specifications for 218002324: Valve Type for Which Designed: BALL; Largest Outside Diameter: 1.301 INCHES MAXIMUM IN; Stem Actuating End Type: SQUARE; Material Document and Classification: ASTM B150, ALY UNS 63200 ASSN STD SINGLE MATERIAL RESPONSE. 6 specifications are documented in the U.S. Government catalog.
No hazard code in the DLA record (HMIC N). Hazard information on this page is shown exactly as it appears in the DLA record.
U.S. Government catalog: edition PUBLOGDVD v12.0.0 (OCT 2026), edition date 2026-10-01, retrieved 2026-10-16.
U.S. Government catalog: edition PUBLOGDVD v12.0.0 (OCT 2026), edition date 2026-10-01, retrieved 2026-10-18.